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COLL ACT FAIL (ACY) CLTV ACTR STAT (ACZ) | Up
TM-1-1520-238-T-3 Army Model AH-64 Helicopter (NSN
1520-01-106-9519) (EIC: RHA) Multiplex Read Codes Manual | Next
PLT DECOUPLER LONG 1 (ACY) P LONG DCPL1 STAT (ACZ) |
TM 1–1520–238–T–3
Change 4
3–23
3–100 SIGNAL NAME:
BUCS TRACER FAIL (ACY) BUCS TRACER STAT (ACZ)
MEMORY LOCATION: 002106
MEMORY DATA BIT(S):
19
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates status of BUCS tracer wires.
REMARKS: From DASEC to FCC.
PASS:
If first digit displayed on HOD is 0, go to paragraph 3–101.
FAIL: Location of fault: BUCS circuit breaker, wiring from circuit breaker to DASEC, DASEC.
Troubleshoot wiring to isolate fault (TM 1–1520–238–T–7).
3–101 SIGNAL NAME:
PLT LVDT LONG (ACY) P LONG LVDT STAT (ACZ)
MEMORY LOCATION: 002107
MEMORY DATA BIT(S):
4
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates status of pilot longitudinal (pitch) linear variable differential transducer
(LVDT).
REMARKS: From pilot longitudinal (pitch) LVDT through DASEC to FCC.
PASS:
If sixth digit displayed on HOD is 0, go to paragraph 3–102.
FAIL: Location of fault: pilot longitudinal (pitch) LVDT, wiring from pilot longitudinal (pitch) LVDT to
DASEC, DASEC. Troubleshoot wiring to isolate fault (TM 1–1520–238–T–7).
3–102 SIGNAL NAME:
PLT LVDT LAT (ACY) P LAT LVDT STAT (ACZ)
MEMORY LOCATION: 002107
MEMORY DATA BIT(S):
5
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates status of pilot lateral (roll) LVDT.
REMARKS: From pilot lateral (roll) LVDT through DASEC to FCC.
PASS:
If fifth digit displayed on HOD is 0, 1, 2, or 3, go to paragraph 3–103.
FAIL: Location of fault: pilot lateral (roll) LVDT, wiring from LVDT to DASEC, DASEC. Troubleshoot
wiring to isolate fault (TM 1–1520–238–T–7).
3–103 SIGNAL NAME:
PLT LVDT DIR (ACY) P DIR LVDT STAT (ACZ)
MEMORY LOCATION: 002107
MEMORY DATA BIT(S):
6
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates status of pilot directional (yaw) LVDT.
REMARKS: From pilot directional (yaw) LVDT through DASEC to FCC.
PASS:
If fifth digit displayed on HOD is 0 or 1, go to paragraph 3–104.
FAIL: Location of fault: pilot directional (yaw) LVDT, wiring from LVDT to DASEC, DASEC.
Troubleshoot wiring to isolate fault (TM 1–1520–238–T–7).
3–104 SIGNAL NAME:
PLT LVDT COLL (ACY) P CLTV LVDT STAT (ACZ)
MEMORY LOCATION: 002107
MEMORY DATA BIT(S):
7
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates status of pilot collective (vertical) LVDT.
REMARKS: From pilot collective (vertical) LVDT through DASEC to FCC.
PASS:
If fifth digit displayed on HOD is 0, go to paragraph 3–105.
FAIL: Location of fault: pilot collective (vertical) LVDT, wiring from LVDT to DASEC, DASEC.
Troubleshoot wiring to isolate fault (TM 1–1520–238–T–7).
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